參數(shù)資料
型號(hào): μPD780031
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 23/44頁
文件大小: 238K
代理商: ΜPD780031
23
m
PD780031, 780032, 780033, 780034
5.4 Clock Output/Buzzer Output Control Circuit
A clock output/buzzer output control circuit (CKU) is incorporated.
Clocks with the following frequencies can be output as a clock output.
65.5 kHz/131 kHz/262 kHz/524 kHz/1.05 MHz/2.10 MHz/4.19 MHz/8.38 MHz (main system clock: at 8.38-MHz
operation)
32.768 kHz (subsystem clock: at 32.768-kHz operation)
Clocks with the following frequencies can be output as a buzzer output.
1.02 kHz/2.05 kHz/4.10 kHz/8.19 kHz (main system clock: at 8.38-MHz operation)
Figure 5-7. Block Diagram of Clock Output/Buzzer Output Control Circuit CKU
X1
f
XT
6
3
4
P
Selector
BZOE
BCS0, BCS1
Clock
control
circuit
CLOE
f
X
f
X
/2 to f
X
/2
6
f
X
/2
7
to f
X
/2
9
f
X
/2
10
to f
X
/2
13
BUZ/P75
PCL/P74
Clock output selection
register (CKS)
BZOE BCS1 BCS0 CLOE CCS3 CCS2 CCS1 CCS0
Internal bus
S
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